FIELD: instrumentation. SUBSTANCE: device includes source of light, polarizer, lenses, compensator, monochromator, photodetector. Compensator is manufactured in the form of quarter-wavelength plate and analyzer. Monochromator is built in the form of two light filters mounted for rotation and presenting semi-circles coupled over diameter. Line of connection of light filters passes through common center of rotation of analyzer and monochromator and is parallel to plane of polarization of analyzer. Light filters are so coupled to analyzer that have capability of joint rotation in plane perpendicular to direction of light propagation. Electromagnetic synchronization pickup is installed on edges of line of connection of light filters. EFFECT: enhanced reliability and accuracy of device. 4 dwg
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